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CROSS ASSEMBLER->Assembler Expressions->Symbols

Symbols in the expression take the value assigned to them in other parts of the source program.

Two special symbols generated by the cross assembler are '*' and NARG (or narg).  
'*'When this is used as a symbol it takes the current value of the program counter.
NARGThis is only allowed within a macro definition and takes the value, during the expansion of the macro, equal to the number of arguments used in the macro call.